QSC LS118 18-in Direct-radiating Active Subwoofer

The LS118 subwoofer delivers exceptional audio performance through advanced system intelligence and premium components, designed with a deep understanding of user needs and application demands. It is easily configurable for various setups, from simple plug-and-play systems to complex, networked AV productions and fixed installations.

Featuring QSC's Acoustic Linear Phase (ALP) design, the LS118 seamlessly integrates with other QSC loudspeakers for coherent sound. It offers daisy-chain connections for analog, Dante® digital audio, and AC power (PowerCON TRUE1). Multiple LS118 units can be arranged in a cardioid configuration, enhancing low-frequency output while reducing unwanted noise.

Paired with LA108 or LA112 line array speakers, the LS118 can be deployed with an array frame or speaker poles in horizontal or vertical orientations.

QSC LS118 Features

• Peak output of 138 dB SPL with powerful low-frequency performance
• 18-inch long-excursion direct radiating driver for superior sound
• 4000 W peak power Class D amplifier with Power Factor Correction for efficient energy use and low AC consumption
• Acoustic Linear Phase (ALP) design ensures seamless integration with QSC loudspeakers, providing a consistent audio experience across venues
• QSC SysNav™ (System Navigator) App simplifies system design, configuration, control, and monitoring, with advanced signal processing capabilities
• Integrated Dante® digital audio-over-IP for interoperability with other devices and Q-SYS Ecosystem control
• Supports omni-directional and cardioid radiation modes (requires two units for cardioid setup)
• Selectable DEEP™ mode for extended low-frequency output
• Durable wooden enclosure with Polyurea coating for long-lasting protection
• Equipped with four heavy-duty, low-noise casters for easy mobility
• Flexible deployment options: vertical or horizontal with M20 threaded pole receivers and array frame/ground-stack adapters
• Pairs with LA108 and LA112 active line array loudspeakers
• Backed by a 6-Year Extended Warranty with product registration

QSC LS118 Specifications

• Configuration:
  • Direct radiating, active subwoofer
• LF Transducer:
  • 18-inch (460 mm) cone
• Frequency Response (-6 dB):
  • 41 Hz – 98 Hz
• Frequency Range (-10 dB):
  • 35 Hz – 111 Hz
• Nominal Coverage Angle:
  • Omni-directional or cardioid modes (requires 2 units for cardioid)
• Maximum Rated SPL (Peak):
  • 138 dB @ 1 m
• Amplifier (Peak):
  • Class D, 4000 W
• Cooling:
  • Low noise, variable speed fan
• Controls:
  • Rotary push encoder
  • 2 push buttons (Menu, ID)
• Display Screen:
  • 2.4-inch full color (240 x 320 pixels)
• Indicators:
• Power LED
  • Limiter active LED
  • Standby active LED
  • 2 Signal LEDs
• Connectors:
  • XLR Female (Analog In)
  • XLR Male (Analog Thru)
  • 2 RJ45 EtherCON (Dante® and QSC SysNav™ In/Thru)
  • 2 PowerCON TRUE1 (AC Power Inlet/Outlet)
• AC Power Input:
  • Universal 100–240 VAC, 50–60 Hz
• AC Power Consumption:
  • 100 VAC: 3.6 A / 120 VAC: 3.0 A / 230 VAC: 1.7 A
• Enclosure Material:
  • 15 mm birch plywood with Polyurea coating
• Attachment Points:
  • 8 x M10 (for vertical or horizontal suspension)
  • 2 x M20 (for pole or ground-stack deployment)
• Color:
  • Black (RAL 9011)
• Grille:
  • 16-gauge powder-coated steel
• Dimensions (H × W × D):
  • 640 × 520 × 790 mm (25.2 × 20.5 × 31.1 in)
• Net Weight:
  • 50 kg / 110 lb (including casters)
• Shipping Weight:
  • 62.6 kg / 138 lb
• Included Accessories:
  • 4 heavy-duty, low-noise 4-inch casters
  • PowerCON TRUE1 power cable
• Regulatory Certifications:
  • UL, CE, FCC Class B